Root-Mean-Square Displacements of Atoms in the B2-Phase of Titanium Nickelide

Using of MoK(alpha) radiation, on a single crystal of a titanium nickelide intensities of 15 structural and 11 superstructural reflections of the B2-phase are measured. Structural factors of scattering for these reflections are calculated, and root-mean-square displacements of atoms of nickel and atoms of titanium from positions of equilibrium are determined. The mean square of displacements of atoms of nickel is equal (u2)Ni=(8.7(plus-minus) 0.6)× 10^-4 nm^2, atoms of titanium -(u^2)Ti=(3.9(plus-minus) 0.3)× 10^-4 nm^2.